Hi Doc, About A Year Ago I Rode A Bicycle

Hi Doc, About a year ago I rode a bicycle for 20-30 miles every other day...Then in june I go to the hospital because it was hard to breathe. They found water on my lung drained it..however, I now have asthma inhaler and sometimes combined it with asthma pill..I'm 55 years old always been in pretty good shape, but now I can't ride my bike a mile without having too stop..unless my medication is working real well..I'm very corncern and I get very nervous with the Doctors..I'm mean can One day riding my bike 20miles and within a few weeks I can't..Doctor if you can guide me in some direction to research I know it's not easy for you but I tried looking up everything..How can I develop asthma..LIKE in a day..for some reason I can't except that answer??.. Thanks, Vince